Defrost the steak pieces and pat dry with a paper towel.
Using a sharp paring or boning knife, cut into even pieces and remove the sinew as necessary.
In a bowl, combine the vinegar, oil, citrus juices, garlic, spices and salt and pepper.
Whisk to blend well.
Stir in the steak pieces and turn to coat.
Cover the bowl and allow the meat to marinate about 30 minutes.
Preheat your Traeger Ranger to 400* with the cast iron plate inside.
When the grill is hot, spray it lightly with cooking oil.
Remove the steak from the marinade and pat dry with a paper towel.
In batches, sear the steak on the heated grill, turning once about 2 minutes per side.
Remove the steak from the grill and continue cooking in batches until all batches reach about 140* for medium cook.
Assemble tacos as desired or use in other delicious applications.